Gut microbiomes of cyprinid fish exhibit host-species symbiosis along gut trait and diet

作者：Yaqiu Liu, Xinhui Li, Yuefei Li, Jie Li, Shuli Zhu · 发表于：Frontiers in Microbiology · 年份：2022 · DOI：10.3389/fmicb.2022.936601 · 被引用次数：31 · 研究领域：Gut microbiota and health、Epigenetics and DNA Methylation、Child Nutrition and Water Access

Teleost omnivorous fish that coexist partially sharing resources are likely to modify their gut traits and microbiome as a feedback mechanism between ecological processes and evolution. However, we do not understand how the core gut microbiome supports the metabolic capacity of the host and regulates digestive functions in specialized omnivorous fish gut traits. Therefore, we evaluated the gut microbiome of eight omnivorous fish from a single family (i.e., Cyprinidae) in the current study. We examined the correlation between host phylogeny, diet composition, and intestinal morphological traits related to the intestinal microbiome. The results indicated that cyprinid fish with similar relative gut lengths had considerable gut microbiome similarity. Notably, the SL (short relative gut length) group, as zoobenthos and zooplankton specialists, was abundant in Proteobacteria and was less abundant in Firmicutes than in the ML (medium relative gut length) and LL (long relative gut length) groups. These fish could extract nutrients from aquatic plants and algae. Additionally, we found the relative abundance of Clostridium and Romboutsia to be positively correlated with host relative gut length but negatively correlated with the relative abundance of Cetobacterium , Plesiomonas , Bacteroides , and Lactobacillus , and host-relative gut length. We also show a positive linear relationship between host gut microbiome carbohydrate metabolism and relative gut length, while the amino acid an...